Kontrolni proračun naprezanja zavarene čelične boce za ukapljeni plin

undergraduate thesis

• Title (english): Control stress analysis of welded steel liquid gas tank
• Author: Danijel Janković
• Mentor: Tomislav Jarak (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2016-09-22, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

Zadatak ovog rada je provesti kontrolni numerički proračun naprezanja i deformacija u postojećem konstrukcijskom rješenju za ponovno punjivu čeličnu bocu za ukapljeni plin. Numerička analiza čvrstoće provedena je u računalnom paketu Abaqus koji je temeljen na metodi konačnih elementa.

U uvodu je detaljno opisan zadani problem i prikazana posuda pod tlakom. Također je razrađen i pojam ukapljenog naftnog plina. U drugom poglavlju opisana je metoda konačnih elemenata i računalni program Abaqus. Pojedini tipovi konačnih elemenata, korišteni u ovome radu, su detaljnije razrađeni. Opisana je i tehnika spajanja različitih tipova konačnih elemenata koja je primijenjena u završnoj analizi. U trećem poglavlju kroz jednostavne primjere, za koje je poznato analitičko rješenje, izvršena je provjera učinkovitosti pojedinih konačnih elemenata i odabir prikladnih tehnika modeliranja te je ispitana točnost tehnike spajanja različitih tipova konačnih elemenata.

U četvrtom poglavlju prikazan je tok numeričkog proračuna zadane plinske boce. Razmatrana su dva modela, trodimenzijski model i pojednostavljeni osnosimetrični model. Pokazani su rezultati naprezanja i pomaka te međusobna usporedba već spomenutih modela. Osim toga, razmatrani su neki detalji koji bi ovaj proračun mogli još više približiti stvarnosti.

Abstract (english)

The aim of this work is to conduct a control numerical analysis of stresses and strains in the existing structural design for a refillable steel liquid gas tank. The numerical analysis of strength was carried out in the computer program package Abaqus, which is based on The Finite Element Methods.

In the introduction, the given problem is described and the pressure vessel is shown. In addition, the concept of liquefied petroleum gas is elaborated. In the second chapter, the Finite Element Method and the computer program Abaqus are described. Certain types of finite elements used in this assignment are further elaborated. Techniques of merging different types of finite elements, which are applied in the final analysis, are described. In the third chapter, through simple examples for which the analytical solution is known, the effectiveness of individual finite elements is computed, as well as the selection of suitable modeling techniques, and the accuracy of merging techniques of different types of finite elements was tested.

In the fourth chapter, the process of numerical calculation of the given gas tank is presented. The discussion focused on two numerical models, a three-dimensional model and a simplified axisymmetric model. The results for stresses and displacements in the tank and the mutual comparison of the mentioned models are shown. Furthermore, some of the details that make this analysis even closer to reality are discussed.

• Keywords: Abaqus; metoda konačnih elemenata; plinska boca; naprezanje; ukapljeni naftni plin
• Keywords (english): Abaqus; Finite Element Method; gas tank; stress; liquefied petroleum gas
• Language: croatian
• URN:NBN: urn:nbn:hr:235:190961
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-05-22 17:22:16